File field becomes String

I have a file_field that works fine when sending up a file. But when making an update the same field behaves like a String, and consequently the params[:file][:attachment].content_type fails. Why is this?

Pål Bergström wrote:

I have a file_field that works fine when sending up a file. But when making an update the same field behaves like a String, and consequently the params[:file][:attachment].content_type fails. Why is this?

Because I missed :multipart => true :slight_smile: